Finding an analytical agent is a good thing but hard to do.I would ask any agent I was interviewing to give me 5 properties they have been the buyer's agent for in the last 6 months and talk to the clients about their experience. 

When an investor gets over 4-5 in a market then we normally talk about diversifying into a different market. 

I am probably the guy you want to talk to as I am a Realtor here in Colorado Springs who primarily works with investors, many of those who flip properties.

A lot of people tend to mingle these things when they talk about "break even" or "cap rate", but that leads to a lot of confusion.Let's use some real numbers which may be easier to understand. 

There have been numerous people on BP talking about how they paid application fees but they could never get their loans closed on any deal brought to the company.

Most commercial lenders want a 680 credit score,  or they won't talk to a borrower.      

Hey tough guy, how about you come out to TN/NC and talk smack....

Neither VRBO nor Airbnb are vetting guests, either.The best you can do is have some internal controls, such as minimum number of nights.

If you are willing to live in urban areas you may want to talk to a local bank in your market and see if they have any incentives or grant loans for certain areas.  

Second Street is an international mortgage lender actively investing in Costa Rica.